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15
N contents and
15
N values, and N/K molar ratios of selected samples and phlogopite separates in Gondwana ultrapotassic suite (Jia et al. 2003)
Table 5.1
δ
ε
15
N
(%)
N/K (
×
10
−
3
) molar
ratio
N
a
(ppm)
15
N
a
(%)
Basin
Sample
no.
Localities
Rock type
N
(ppm)
δ
K
2
O
δ
Damodar valley, East India
Bokaro
CP60/93
Jarangdih
Lamproite
163
18.9
252
4.4
2.89
5.2
D-4
Bokaro
Lamproite
88
5.6
3.9
5.32
Jharia
SD-1
Sudamdih
Lamproite
209
9.9
244
4.3
7.09
3.8
SD-1
Sudamdih
Lamproite
63
6.2
SD-3
Sudamdih
Lamproite
232
10.9
1.5
7.14
P-1
Pathardih
Lamproite
277
12.7
405
1.6
7.31
1.4
P-2
Pathardih
Lamproite
294
13.1
2.2
7.56
Raniganj
M2/1
Mohanpur
Lamproite
119
11.7
260
4.1
3.42
3.4
M2/2
Mohanpur
Lamproite
394
28.2
5.5
4.69
KH-1
Khudia
Lamprophyre
82
5.6
450
1.6
4.91
3.7
KH-2
Khudia
Lamprophyre
371
25.1
3.3
4.96
Andhra Pradesh, South India
Cuddapah
R8339A
Chelima
Lamproite
21
2.9
8.7
2.41
Primitive
mantle
b
1
-
2
112
-
22.3
0.0301
Continental
crust
c
60
9.4
2.14
a
Values were measured on phlogopite separates
b
N and K
2
O contents of mantle are from Marty (1995) and Sun and McDonough (1989), respectively
c
N and K
2
O contents of continental crust are from Wedepohl (1995)
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